People with chronic conditions like diabetes and lung and heart disease are at greater risk of being hospitalized due to the coronavirus – but more than one in five patients who end up in intensive care had no such health problems, according to a report.

Higher percentages of patients with such underlying conditions have been admitted to hospitals, the Centers for Disease Control and Prevention said in its latest Morbidity and Mortality Weekly Report.

Preliminary data from 7,162 patients show that 37.6 percent had one or more underlying medical conditions, according to the CDC report.

Difficulty breathing is a symptom that sends many people to the hospital, but the new data show how the underlying conditions increase the chances of serious complications.

Researchers found that 78 percent of people in intensive care had at least one underlying health problem, including diabetes (seen in 32 percent of patients), cardiovascular disease (29 percent) and chronic lung disease (21 percent), according to a Reuters report on the CDC’s findings.